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-rw-r--r--sound/oss/sb_ess.c28
1 files changed, 14 insertions, 14 deletions
diff --git a/sound/oss/sb_ess.c b/sound/oss/sb_ess.c
index fae05fe3de43..180e95c87e3e 100644
--- a/sound/oss/sb_ess.c
+++ b/sound/oss/sb_ess.c
@@ -97,19 +97,19 @@
97 * 97 *
98 * The documentation is an adventure: it's close but not fully accurate. I 98 * The documentation is an adventure: it's close but not fully accurate. I
99 * found out that after a reset some registers are *NOT* reset, though the 99 * found out that after a reset some registers are *NOT* reset, though the
100 * docs say the would be. Interresting ones are 0x7f, 0x7d and 0x7a. They are 100 * docs say the would be. Interesting ones are 0x7f, 0x7d and 0x7a. They are
101 * related to the Audio 2 channel. I also was suprised about the consequenses 101 * related to the Audio 2 channel. I also was surprised about the consequences
102 * of writing 0x00 to 0x7f (which should be done by reset): The ES1887 moves 102 * of writing 0x00 to 0x7f (which should be done by reset): The ES1887 moves
103 * into ES1888 mode. This means that it claims IRQ 11, which happens to be my 103 * into ES1888 mode. This means that it claims IRQ 11, which happens to be my
104 * ISDN adapter. Needless to say it no longer worked. I now understand why 104 * ISDN adapter. Needless to say it no longer worked. I now understand why
105 * after rebooting 0x7f already was 0x05, the value of my choice: the BIOS 105 * after rebooting 0x7f already was 0x05, the value of my choice: the BIOS
106 * did it. 106 * did it.
107 * 107 *
108 * Oh, and this is another trap: in ES1887 docs mixer register 0x70 is decribed 108 * Oh, and this is another trap: in ES1887 docs mixer register 0x70 is
109 * as if it's exactly the same as register 0xa1. This is *NOT* true. The 109 * described as if it's exactly the same as register 0xa1. This is *NOT* true.
110 * description of 0x70 in ES1869 docs is accurate however. 110 * The description of 0x70 in ES1869 docs is accurate however.
111 * Well, the assumption about ES1869 was wrong: register 0x70 is very much 111 * Well, the assumption about ES1869 was wrong: register 0x70 is very much
112 * like register 0xa1, except that bit 7 is allways 1, whatever you want 112 * like register 0xa1, except that bit 7 is always 1, whatever you want
113 * it to be. 113 * it to be.
114 * 114 *
115 * When using audio 2 mixer register 0x72 seems te be meaningless. Only 0xa2 115 * When using audio 2 mixer register 0x72 seems te be meaningless. Only 0xa2
@@ -117,10 +117,10 @@
117 * 117 *
118 * Software reset not being able to reset all registers is great! Especially 118 * Software reset not being able to reset all registers is great! Especially
119 * the fact that register 0x78 isn't reset is great when you wanna change back 119 * the fact that register 0x78 isn't reset is great when you wanna change back
120 * to single dma operation (simplex): audio 2 is still operation, and uses the 120 * to single dma operation (simplex): audio 2 is still operational, and uses
121 * same dma as audio 1: your ess changes into a funny echo machine. 121 * the same dma as audio 1: your ess changes into a funny echo machine.
122 * 122 *
123 * Received the new that ES1688 is detected as a ES1788. Did some thinking: 123 * Received the news that ES1688 is detected as a ES1788. Did some thinking:
124 * the ES1887 detection scheme suggests in step 2 to try if bit 3 of register 124 * the ES1887 detection scheme suggests in step 2 to try if bit 3 of register
125 * 0x64 can be changed. This is inaccurate, first I inverted the * check: "If 125 * 0x64 can be changed. This is inaccurate, first I inverted the * check: "If
126 * can be modified, it's a 1688", which lead to a correct detection 126 * can be modified, it's a 1688", which lead to a correct detection
@@ -135,7 +135,7 @@
135 * About recognition of ESS chips 135 * About recognition of ESS chips
136 * 136 *
137 * The distinction of ES688, ES1688, ES1788, ES1887 and ES1888 is described in 137 * The distinction of ES688, ES1688, ES1788, ES1887 and ES1888 is described in
138 * a (preliminary ??) datasheet on ES1887. It's aim is to identify ES1887, but 138 * a (preliminary ??) datasheet on ES1887. Its aim is to identify ES1887, but
139 * during detection the text claims that "this chip may be ..." when a step 139 * during detection the text claims that "this chip may be ..." when a step
140 * fails. This scheme is used to distinct between the above chips. 140 * fails. This scheme is used to distinct between the above chips.
141 * It appears however that some PnP chips like ES1868 are recognized as ES1788 141 * It appears however that some PnP chips like ES1868 are recognized as ES1788
@@ -156,9 +156,9 @@
156 * 156 *
157 * The existing ES1688 support didn't take care of the ES1688+ recording 157 * The existing ES1688 support didn't take care of the ES1688+ recording
158 * levels very well. Whenever a device was selected (recmask) for recording 158 * levels very well. Whenever a device was selected (recmask) for recording
159 * it's recording level was loud, and it couldn't be changed. The fact that 159 * its recording level was loud, and it couldn't be changed. The fact that
160 * internal register 0xb4 could take care of RECLEV, didn't work meaning until 160 * internal register 0xb4 could take care of RECLEV, didn't work meaning until
161 * it's value was restored every time the chip was reset; this reset the 161 * its value was restored every time the chip was reset; this reset the
162 * value of 0xb4 too. I guess that's what 4front also had (have?) trouble with. 162 * value of 0xb4 too. I guess that's what 4front also had (have?) trouble with.
163 * 163 *
164 * About ES1887 support: 164 * About ES1887 support:
@@ -169,9 +169,9 @@
169 * the latter case the recording volumes are 0. 169 * the latter case the recording volumes are 0.
170 * Now recording levels of inputs can be controlled, by changing the playback 170 * Now recording levels of inputs can be controlled, by changing the playback
171 * levels. Futhermore several devices can be recorded together (which is not 171 * levels. Futhermore several devices can be recorded together (which is not
172 * possible with the ES1688. 172 * possible with the ES1688).
173 * Besides the separate recording level control for each input, the common 173 * Besides the separate recording level control for each input, the common
174 * recordig level can also be controlled by RECLEV as described above. 174 * recording level can also be controlled by RECLEV as described above.
175 * 175 *
176 * Not only ES1887 have this recording mixer. I know the following from the 176 * Not only ES1887 have this recording mixer. I know the following from the
177 * documentation: 177 * documentation: